However, Russia, as one of the five permanent members of the UNSC, has the power to veto any proposal of sanctions.
The ICC, on the other hand, has the power to investigate and prosecute war criminals individually, of which an investigation into Russia’s actions is currently underway. [link to Express article]
However, it can be difficult to link head of states directly to war crimes, as it could be argued they may not know of the events occurring on the ground.
What’s more, even if Putin were to be charged, he would have to be arrested in a state that – unlike Russia, who opted out of the Rome Statute in 2016 – accepts the jurisdiction of the court.
It is very unlikely that Putin would extradite himself or any other suspects, and enter into a country signed to Rome Statute, that could potentially arrest him.